This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A106878 #21 Aug 05 2014 14:16:29 %S A106878 3,5,7,13,17,47,73,83,97,103,157,167,173,223,227,257,283,293,307,313, %T A106878 353,367,383,397,433,467,503,523,563,577,587,593,607,643,647,677,727, %U A106878 733,773,787,797,853,857,887,937,983,997,1013,1063,1097,1123,1153 %N A106878 Primes of the form 3x^2+xy+3y^2. %C A106878 Discriminant=-35. %H A106878 Vincenzo Librandi and Ray Chandler, <a href="/A106878/b106878.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106878 N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references) %t A106878 Union[QuadPrimes2[3, 1, 3, 10000], QuadPrimes2[3, -1, 3, 10000]] (* see A106856 *) %Y A106878 Primes in A243179. %K A106878 nonn,easy %O A106878 1,1 %A A106878 _T. D. Noe_, May 09 2005